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<head>
  <meta charset="UTF-8">
  <meta name="viewport"
        content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0"
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  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Document</title>
</head>
<body>
<script>
  // const row = {name: '黑马'}
  // const obj1 = Object.assign(row, {
  //   name: '传智',
  //   age: 18
  // })
  //
  // console.log(row === obj1) // true
  // console.log(row)

  const arr1 = [4,5,6]
  const arr2 = [7,8,9]

  // [4,5,6,7,8,9]

  const arr3 = arr1.concat(arr2) //
  console.log(arr1)
  console.log(arr2)
  console.log(arr3)
</script>
</body>
</html>
